.cd-top {
	display: inline-block;
	height: 50px;
	width: 50px;
	position: fixed;
	bottom: 60px;
	right: 70px;
	box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
	overflow: hidden;
	text-indent: 100%;
	white-space: nowrap;
	background: url(../img/method-draw-image.svg) no-repeat center 50%;
	background-color: white;
	visibility: hidden;
	opacity: 0;
	-webkit-transition: opacity .3s 0s, visibility 0s .3s;
	-moz-transition: opacity .3s 0s, visibility 0s .3s;
	transition: opacity .3s 0s, visibility 0s .3s;
	border: solid 1px darkgray;
	border-radius: 5px;
	z-index: 999;
}

.cd-top.cd-is-visible, .cd-top.cd-fade-out, .no-touch .cd-top:hover {
	-webkit-transition: opacity .3s 0s, visibility 0s 0s;
	-moz-transition: opacity .3s 0s, visibility 0s 0s;
	transition: opacity .3s 0s, visibility 0s 0s;
}

.cd-top.cd-is-visible {
	/* the button becomes visible */
	visibility: visible;
	opacity: 1;
}

.cd-top.cd-fade-out {
	/* if the user keeps scrolling down, the button is out of focus and becomes less visible */
	opacity: .5;
}

.cd-top:hover {
	border-color: dodgerblue;
	background: url(../img/cd-top-arrow.svg) no-repeat center 50%;
	background-color: dodgerblue;
	opacity: 1;
}